Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Brand
ETA
Winding
Hand winding
Regulators
ETACHRON
Production Periods
1970s
1980s
1990s
2000s
Frequency
28,800 A/h
Anti-Shock
Jewels
17
Balance Mount
Back-Side Features
Balance
-Balance at 10:30
ETA 2660
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